Food Webs

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Transcript of Food Webs

Food WebsWhat is a Food Web?You may be wondering what is a food web anyway? A food web is like a pyramid of food chains. It shows all kinds of food chains and the relationship between organisms in an ecosystem. Here are some examples of a food web. Sun, air, water and soil are all taken in by plants to make their food. The producers feed on the primary consumer (herbivore) and then it goes on with either omnivores or carnivores. When you reach the end of a food chain theres always decomposers. Decomposers can be worms, bacteria mushrooms and all other sorts of organisms. Decomposers break down the dead organisms into nutrients that are returned to the soil. Energy Transfer Habitats A habitat is where an organism lives. A habitat gives the organism food water and shelter. Now some people mistaken habitats with ecosystem. Now a ecoystem is where organisms work together. Some examples of a habitat are our homes another one is wolves in a den. Tolerance Tolerance is the ability of an organism to withstand certain abiotic factors. Abiotic factors refer to heat, water, light, and weather. Tolerance is very important in the survival of an organism. Because if organisms can't withstand very much abiotic factors they will usually die off quickly. Energy transfer is the transfer from one object to another. Energy transfer can be anything like a stove heating a pan, getting energy from our breakfast, to plants using energy from the sun to produce food. Energy can also travel in organisms. For example a producer (plant) uses energy from the sun in photosynthesis to make its own food. Then the primary consumer eats the producer and gets energy from the producer. After that its just a cycle. Decomposers get there energy from consumers and gives the energy back to producers through nutrients.Limiting Factors Limiting factors are factors that limit the growth population species size and distribution. Also limiting food, water, and shelter. For example if 10 rabbits live in a habitat with water and shelter but not enough food to support the ten rabbits, then in this case food is the limiting factor. Terrestrial Food Chain A terrestrial food chain is a food chain that only occurs with land animals. An example of a simple terrestrial food chain is a mouse eats a plant (grass) a snake eats the mouse and the hawk eats the snake.EcosytemsAn ecosystem is a complex set of living among organisms. It includes plants, trees, animals, fish, birds, water, soil, and people. Some people confuse a habitat with an ecoystem. But a habitat is just a place an organisms lives. An ecosystem is a place where organisms work together to form a community. Aquatic Food Chain An aquatic food chain is just a food chain thats in water. An example of an aquatic food chain is the farming practice called aquaponics. Aquaponics is growing food with toxic amonia waste. The fish waste is converted by bacteria into nutrients for the plants. In this ecosystem the fish are the consumers bacteria are the decomposers and the plants are the producers.